Rotary motor tool



May 20, 1930. J. ,1. N; VAN HAMERsvELD 1,759,473

ROTARY MOTOR TooL Filed oct. 12, 1927 I 2 Sheets-Sheet l J. J. N. VAN HAMERSVELD 1,759,473

ROTARY MOTOR TOOL May 20, 1930.

i so

Patented May 20, v1.930

UNITED STATESl PATENT OFFICE Joan J. N. VAN nAMEnsvnLD, or CLEVELAND HEIGHTS, omo, AssIvGNon. "ro THE Boron' AIR Toor. column, or c LEvELAND, omo, A CORPORATION oF omo ROTARY MOTOR TOOL Application mea october v12, 1927. serial No. 22am.

This invention relates to a fluid pressure i motor, such, for example, as a pneumatic motor employed for operating a suitable tool,

, such as a surfacing tool, although the invention 'is not limited to the particular tool which 'the motor rotates.

The .principal object of the invention is to provide a construction which embodies to 'a high degree the features of compactness,

- eiciency, lightness in weight, and-ease of assembly.

A' further object is to provide a construction involving a cylinder body with a lateral. extension for sliding blades, .air ports and '415 the like, together-with end plates, the whole being so constructed that the plates can bel fitted to the body and centralized thereon without the necessity for interlitting por-l tions which would interfere with`the space 2o desired for fluidpressure passageways and which enables the inner sides of the plates where they, engage the extension of thecylinder. body to form smooth and uninterrupted guide surfaces for the abutment l blades which .reciprocate in the extension and whose inner edges engage the rotor,

which surfaces are continuations of the surfaces ofthe plates which form'the4 end Walls of the cylinder.

.tion wherein the cylinder body has a laterlallyprojecting handle which supplies the air vto the. cylinder body, the. motor having a spindle for governing the speed of the motor, with suitable provision arranged without substantially increasing the bulk of the mo-v tor for conducting. the air from. the lateral extension-of the cylinderpody to which the handle is .attached to the governorchamber vand hackl again tothe extensionnbefore entering the main inlet passageway formed in the cylinder body.

Afurther object is (to provide a construcgovernor mounted on the end of the motor he above and otherfobjects-'areobtained by my invention which may be herebrielly` sfeciacaiomnd sa .forth -inf' *the-inner cy In the accompanying sheets of drawings wherein I have illustrated the preferred form of the invention, Fig. 1 is a plan view of a fluid pressure tool embodying the invention; Fig. 2 is a'sectional view substantially along the line 2-2 of Fig. 1; Fig. 3 is a side view of one of the rotors of the tool; Fig. 4 is a sectional view of the same; Figs. 5, 6 and 7 are detached views showing, respectively, one ofthe end plates, the cylinder body, and the other end plates; Fig. 8 is an end view of the motor with the adjacent end plate removed; Fig. 9 is an inside view of one of the end plates showing the segmental flange for centralizing the end plate' on the cylinder body; andFig. 10 is a side elevation of the cylinder body of Fig. looking toward the cylinder extension. Y

Referring now to the drawings, ,the tool,

herein illustrated includes a motor-having a' cylinder body 15 formed in one piece, as

hereinafter described, and closed at its ends Y by two end plates 16 and 17 having bearings 18 for a motor spindle 19 which is provided at one end with a suitable tool here shown as a surfacing disk'20, the outer flat face of which is adapted to be pressed against the work to be surfaced. Other tools may be employed in place thereof. l

The cylinder body has a cylindrical bore extending fromend to end therethrough, and mounted midway of the ends of the cylinder body is an annular dividing partition 21 held in place by .radially disposed screws 22 passinguthrough the vcylinder body into the periphery ofthe partition. On opposite sides of the partition and keyed or otherwise secured to the shaft are two eccentric rotors "23, shown detached in Figs.4 3 and 4, which rotors are spaced'lSOC apart and, as illus- .trated in Figs; '2, 3 and 4, are hollowed out. forA the sake of lightness with the metal dise posed `so thatfeach is in staticand kinetic balance. I The cylinder body is formed on. the -side with a lateral extension 24 and formedpinthis extension and extending inward from op- ..posite-A ends ofthe cylinder body 'toward but "not entirely tothe center; and also formed f from the. ogpos'iteend 4of Ithe extension to j drical bore, are two guide alotaf` 25 which receive sliding abutments 26 whose tools where accuracy, eiciency, and lightness inner ends are maintalned in contact with are required.

Themachine has two handles, one, desigbetween these uide slots 254 is the same as nated 33, being secured to a lug 34 formed on 'the thickness o the partition 21, as shown in the side of thev cylinder body, and the other, Fig. 2.- Additionally, the extensionl 24 has designated 35, being secured onto'the) end of I 4formed from side' to side therethrough on the' cylinder extension 24. Thehandle 35 has opposite sides of the guideways a main a passageway 36 extending therethrough for' j l inlet passageway 27 for the motive fluid the air which operates the motor, the air being which-is generally air and will be so referred supplied to this passageway through an inlet.

to hereafter, and a main air outlet passageopening 37 formed at theextreme end ofthe way 28. There is formed also in the eXtenhandle and adapted to receive aV suitable su sion and extending from the outer face thereply tube or hose. Also extending longitu iof to the inner bore a series of auxiliary inlet nally of the handle parallel to the inlet paspassageway 27, extending at right angles which lubricant may pass tothe air passagethereto, and a s eries of auxiliary exhaust way 36 at a rate dependent upon the position .passageways which intersect the main eX- of an adjustable needle valve `39.

' aust passageway 28. From the outer ends of the auxiliary inletv passageways 29 ports which can be operatedconveniently by the 31 extend-to the outer portions of the guidethumb or finger of the operators hand engagways 25 sothat air pressure is exerted l on 'ingthe handle 35. This leveris mounted on a the'ends of the abutment blades which will, stem having at its inner end an eccentric41 therefore, be held yieldingly against the two eccentric rotors 23. transmit movement to a'sliding valve 43-en- It will be observed particularly lby refergaged by a spring 44, and by this sliding ence to Figs. 5, 7 and 9 that the end plates movement adapted' to cover and uncover lhave a contour substantially the same' as the ports .formed .in the valve sleeve 45, which Y co'ntour ofthe4 cylinder body viewed from the ports are adapted to place the passageway 36 end. That is to say, each has a substantially. in communication with a passageway` 46 passageways 29 which intersect the main inlet sageway 36 is a lubricant passageway 38l from which, by means of a. pin 42, lis adapted to' The handle carries also a valve lever 40 i circular portion closing the end of the'cylinformed in the base of the handle 35. -It might der body andl each has an extension lyingbe here stated that la portion of the base of alongside the lateral extension 24 of the Cylthe handle forms a covering for the cylinder inderbody. Likewise, it will beobserved Y and uninterrupted. -The adjacent engaging mnece'ssity for dowels, bushings and the like shapeor contour of the end of the 'cylinderll a extension 24, closin'g the outer ends of the each of these end plates has a segmental, inuideways 25 and closing the auxiliary inlet wardly extending flange 32 which is circular except for an arc-'shaped portion omit-ted atJ the ports 3l. The passageway 46 extends and adjacent the extension of the en d plate, laterally from a point adjacent t-he valve 43 note particularly Fig. 9. These end plates fit to the end face of the handle.

flat against the substantially annular por- Ordinarily, the air would pass substantions at the ends of the cylinder body and the tially directly from the handle to the main nd exhaust passageways29and 30 as well as los extensions of the end plates fit flat against inlet passageway 27 of the cylinder, but not so the ends of the cylinder body extension, and in this instance for the reason that I extend the substantially circular flanges 32 t closely the Vmotor spindle 19 through and beyond the over the outer wall ofthe cylinder body so as endv plate 16 and mount on the extension a to centralize the end plates so that the bearspeed controlling governor 47 which in coning receiving portions are truly concentrlc struction maybe similar to that disclosed in with the vaxis of the machine. It is to be noted my prior .application Serial No. 122,351, iled also that the inner faces of the end plates are, July 14, 1926, Patent No. 1,674,579, granted with this construction,.flat', the substantially June 19, 1928. This governor iS hOuSed in a annular portions forming bearing surfaces Chamber 48a formedlll a Ca-P 48 WhlCh'lS Sefor the rotors and tho extensions forming cured to the outerface ofthe end plate 16. guides for the abutment blades, the guide l surfacesfor the abutment blades and the bear'` ing-surfaces for the rotors being continuous from the passageway 46 to-,the governor, I form in the end platr 16 directly opposite the adjacent abutment b ade 26 a passageway 49 faces of the cylinder body and nd plates are whose outer portion-is radially disposed andl v carefully machined and the end plates are not only centralized but the 'parts vare closely fitted together to avoid leakage without the necessity for gaskets and there is avoided the end plate in line withtheinn'er end of the passageway 46 formed in the handle' 35. It will be noted that the base of the handle fits against and in contour'` corresponds to the heretofore required in tools of this kindto body extension and-of the end of the extenalign the parts, especially in the best designed sion of the end platev 16.` The outer end of terminates in the end of the'extension of this` vIn order that the air may be conducted l passageway 49 is in registration with the ininto the governor, and when the motor is in operation it passes out through the weight controlled ports ofthe governor into the chamber 48a. From this chamber the air ,passes through a passagewayV 51 formed partly in the cap and partly in the end plate 16, as indicated by dotted lines in Figs. 1 and A 2, to the main air inlet passageway 27 formed in the cylinderrbody extension. From this last mentioned passageway the air may pass to both of the cylinder chambers in the well known manner. 'Ihe air is exhausted by way of the main exhaust passageway 28 which has small exhaust openings 28a extending laterally therefrom to the outer side of the cylinder. body extension.

From the above it will be 4seen that the operator, by manipulating the valve lever 40, allows the air ,to pass from the handle to the passageways formed in the base of the handle adjacent the outer end of the cylinder-extension and in the end plate 16 and through v the cap secured to the outer face thereof into the governor which is mounted on I 1. In a fluid pressure tool, a motor having a stationary portion provided with alateral v extension and having acylinderv bore, a spindle having a rotor in` the cylinder bore, a handle secured to said extension and having a fluid passageway extending therethrough, a governor at one end of the spindle and passageways for conducting fluid from the handle to the governor and from the governor back to the said lateral extension.

2. In a fluid pressure tool, a motor having a cylinder body with a cylinder bore and with a lateral extension, a spindle havingA a rotor in the cylinder bore, a governor at one end of the spindle, end members at the ends of the cylinder body and one having a governor chamber, a handle secured to the endof the cylinder'body extension and having a uid passageway, an inlet passageway formed in.

the cylinder body extension, and passage- Ways extending from the handle to the governor chamber and back from the governor chamber to said main inletpassageway of the cylinder .body extension,

3. In a iuid pressure tool, a motor comprising a cylinder body with a cylinder bore and with a lateral extension, a spindle having a rotor in said bore, end members closin the ends of the cylinder body, a handle havmg a y fluid passageway and a controlling valve a main inlet passageway formed in the cylinder body extension, a governor connected with the spindle, a governor chamber formed 1n one of the end members, and passageways and xtending from the valve to the governor and rotated by the motor spindle, then to the glaek to said main inlet passageway.

ernor chamber and back again to the cylinder body extension. In the passage of air in this more or less circuitous manner through'the various parts of the machine from the handle on the cylinder extension to the governor on thaekiotor spindle and back again, there is no ge of air, the passageways being formed largely by coring the parts through which they extend and without in any material respect increasing the bulk of the machine, the features of compac'tness and rigidity as well as lightness belng maintained throughout the design. 'The manner in which the end plates are centralized on the cylinder body is a .factor in theattainment of compacttween the stationary and rotating parts, re-

sulting in Lreduced size and increased power.- -It will loe-seen, therefore, that by the construction described above I havev attained to 'a highc degree the A. results and advantages `enumerated in the early part of the specification, and while I pyefer the construction herein illustrated, changes may be madelwithout departing from the spirit and scope of the Y, invention.

Having thus described my invention, what I claim is:

a fluid passageway and a controlling valve,

a main inlet passageway formed in the cylinder body extension, a governor connected with the spindle, a governor chamber formed in one of the endmembers, and passageways extending from the valve to the governor and back to said maininlet passageway, all said passageways except the main inlet passageway being formed independently of the cyl- 1n er body. (v

v5. In a Huid pressuretool such as described,

a motor comprlsm a cylinder body having a cylinder bore and aving a lateral extension,

a spindle having a rotor in said bore, said c 1- paving-abutment bla es inder body extension slidable therein and a their inner ends adapted to engage the rotor, and said cylinder body extension having a main inlet passageway communicating with the cylinder bore,\ a governor yconnected with the spindle, end members at the ends-of the. cylinder body, one of the end members having a chamber formed therein receiving the governor, a`

handle secured tothe said extension and having a valve controlled fluid passageway formed therein, and passageways extending from the valve to the governor and from the governor chamber back to said main vinlet passa eway.

6. Huid pressure notor vcom rising a cylinder body having a. cylinder ore and Erovded with a lateral extension, a. spindle aving a rotor in said bore, end plates secured to the ends of the c linder body, a cap .Y (l, plates, a governor secured to one of said en connected with the spindle and housed within said cap, a handle secured tothe end of the valve to the governor and from t e governor chamber back to `said main inlet pas-` `sa eway of the 'cylinder body extension;

testimony whereof,' I hereunto aiX my signature.

JOHN; J.1N vAN/ HArmRsVELD. 'l 

